Parallel-ruler



(No Model.)

. I 2 She'ets-Sheet -1. G. L. WARREN 85.13. J'. TIESING. PARALLELRULE-R.

No. 600,758. Patented Mar. 15,1898.

WW i w M m Attorneys.-

(No Model.) 2 ShetsSheet 2'.

G. L. WARREN & E. J; TIESING.

PARALLEL RULER.

No. 600,758. Patented Mar. 15,1898.

Nl'lED STATES GEORGE L. WVARREN AND EDWARD J. TIESING, OF NEW HAVEN,CONNECTICUT.

PARALLEL-RULER.

SJPEQIFICATION forming part of Letters Patent No. 600,758, dated March 15, 1898. Application filed June 23, 1897. Serial No. 641,941. (Nomodel.)

To all whom it may concern: Be it known that we, GEORGE L. WARRE andEDWARD J. TIESING, citizens of the United States, and residents of NewHaven, county of New Haven, and State of Connecticut, have inventedcertain new and useful Improvements in Parallel-Rulers, of which thefollowing is a full, clear, and exact specification.

Our invention relates to draftsmens utensils, more particularly torulers, adapted also for other purposes; and it consists of theherein-described device for setting a movable ruler-blade at any desiredangle to another stationary, provided with means for affixing the sameupon the surface to be ruled, and for shifting the movable blade atadjustable equidistant steps, while at the same time its angularposition in relation to the stationary blade is maintained unchanged.

Our invention is illustrated in the accompanying drawings, whereinFigure 1 is a rear elevation of our parallel- 'ruling device; Fig. 2, atop view, and Fig. 3 Fig. 4 is a sectional an end view, thereof. view online 4 4, indicated in Fig. 2. Figs. 5 and 6 are similar sectional viewsshowing the relative positions of the several parts at different stagesof the operations. Fig. 7 is an elevation of a clamping-plate.

Our parallel-ruler consists of the stationary blade A, rod B, rigidlysecured thereto in brackets a, support C, provided with a bifurcatedprotractor-head C, a movable blade E, with pointer e pivoted thereto,the clamping and shifting devices 0 and p, and gage D.

Blade A is provided with prongs j, fixing it in position. Brackets a aresecured to the stationary blade A by screws b in such position as tohold the rod B exactly parallel to the edges d and d. On this rod Bslides support C, having an outward-projecting circular head C, providedon its edge with graduations indicating angles from Zero to one hundredand eighty degrees. Head C is bifurcated, and strip 7% inserted in theslot is pivoted to it by screw 70. Pointer e is rigidly secured to thestrip h, its apex being in close proximity to the graduated edge of thehead C.

. vertical position.

Blade E is secured to strip h by screws h in such position that thepointer e will always indicate its angular deflection from the edges dand d of the stationary blade A. Thus by using pointer e in connectionwith the graduations of the head C the oscillating ruler E can be set atany desired angle to the stationary blade.

Support C consists of a base-plate f and standards Z, made integraltherewith and provided with corresponding bores fitted closely upon therod B. Between the standards Z and exactly in their axial line isprovided slot m, extending over the whole space between the standards Z.Recesses it, one on each end of the base-plate outside of thesestandards Z, are in the same line. Clampingplates 0 are slid on rod Bbetween the standards Z, and spring .9 presses them apart against thestandards Z, holding them normally in Their lower ends are set in theslot m and slide therein. Rod B passes through apertures 0 of theseclamping-plates, which are slightly larger than its sectional area topermit setting of these plates in position as shown in Fig. 5. The edgesof these apertures 0 clamp tightly the rod when plates 0 are held insuch inclined position. 19 are similar in shape and construction to theclamp-plates 0. I They are slid on the rod and their ends are set inrecesses 72 on the endsof the base-plate f. These clamping plates are,however, normally held in inclined position in relation to the rod B bythe springs q, slid on the rod between the plates and the standards Z.They are inclined oppositely to each other andthereby lock support Cupon rod B, preventing its motion in either direction. Blade E, pivotedto the head of support C, is thus held securely against longitudinaldisplacement in relation to the stationary blade A, though the clampingof the support C does not prevent the swinging of blade E around the rodB. Support C may be freely moved on rod B when the clamping-plates p arepressed toward the standards Z in the manner indicated in Fig. 6.Rulerblade E may be fixed in i any position to the Plates support 0 byscrew 70, and thus by shifting the support parallel lines may be drawnany distance apart, this distance being only limited by the length ofthe rod B.

More often it is required to draw parallel lines (such as in shading ofsurfaces in drawings) equidistantly from each other. This isaccomplished by the cooperation of brakeplates 0 and gage D in thefollowing manner:

We have already explained that when the clamping-plates p are pressedtoward each other, as indicated in Fig. 6, the support C may be movedalong the rod B at will and that plates 0 clamp rod B when they are setagainst it in an inclined position. GageD is set between the plates 0and is provided with a downward-proj ectin g guide '1', fitted into theslot 772, and with upward-bent flanges a) on both sides. When either ofthese flanges abuts against one of the plates 0, it will press the edgeof its aperture against the rod B and thereby arrest the motion of thesupport 0. If the one of the plates 0 standing'in the direction of thecontemplated motion of the support 0 is held to the rod B while thesupport 0 is moved forward, the motion of the support will be arrestedwhen the flange o of the'gage reaches it. Thus the length of the motionof the support 0 upon the rod B may be varied by increasing ordiminishing the distance between the flange of the gage and thecorresponding plate 0. GageD is pointed and there is a scale a engravedupon the baseplate of the support 0 in such position that the point t ofthe gage D will indicate this distance upon the scale. Gage D isprovided with a slotted arm y and is secured in position by screw w,passing through the slot 00 into the standard Z. Gage D may thus beadjusted in any position between the plates 0. Scale 10 may be dividedinto fractions of inches or of any other unit of measures.

When it is required to draw parallel lines equidistantly from eachother, the gage D is set to indicate on the scale a the distance atwhich said parallel lines are to be drawn, and then the support 0 ismoved by applying the index or middle finger of one hand to one plate 0,(according to the direction the support is to be moved,) and then withthe thumb of the same hand appliedto the opposite plate 19 the supportis moved until the flange '0 of the gage abuts against the plate 0. Thisstops the motion of the support 0 on rod B and when the hand is removedfrom the plates 0 and p or the pressure released springs s and q returnthem to their normal position. The ruler E will then be advanced exactlythe required distance, as indicated on the scale u, and held there bythe clamping action of plates 19, as explained above. When the line isdrawn, a similar operation will move the blade E an equal distancefarther. When the support reaches the other end of the rod B, it may bereturned without stopping to its starting-point in the manner described,or the gage D may be reset and the parallel-ruli'n g proceeded with inreversed direction, the support 0 being shifted in the same manner.

Screws 7t and w, fixing the ruler-blade E and the gage D in adjustedpositions, are operated by pins 7c and w, respectively. They may,however, equally well be made with square or polygonal heads andoperated by av key or otherwise.

WVe claim as our invention and desire to secure by Letters Patent- 1. Aparallel-ruler comprising a stationary blade, a rod fixed in standards,secured to the stationary blade; a support, sliding on the rod, and acircular head integral with the support; a movable blade, pivoted to thehead; fixed clamping-plates, slid on the rod and having their endsengaged in recesses, provided in the base-plate of the support; springs,set on the rod between the standards of the support and the fixedclamping-plates and holding them in their normal, clamping positions,locking the support to the rod.

2. A parallel-ruler comprising a stationary blade, a rod fixed instandards, secured to the stationary blade; a support, sliding on therod, a slot provided in the base of the support, parallel to the fixedrod, a head integral with the support, and projecting beyond the edge ofthe stationary blade, and a movable blade pivoted to the head; fixedclamping-plates, slid on the rod and having their ends engaged inrecesses provided in the base-plate of the support; springs, set on therod between the standards of the support and the fixed clamping-plates,and holding them in their normal clamping positions, locking the supportto the rod; movable clampingplates, slid on the rod between thestandards of the support and having their ends guided in the slot, aspiral spring, slid on the rod between the movable clamping-plates andholdin g them normally at a right angle to the fixed rod, and anadjustable stopping device secured to the support between the movableclamping-plates.

3. The combination of a fixed rod, a support, suspended on the rod,spring-actuated clamping-plates, fixed in the support; movableclamping-plates, slid on the rod between the standards of the support,and having their ends engaged in a slot, provided in the base of thesupport, a spiral spring, slid on the rod between the movableclamping-plates and holding them normally at a right angle to the rod,and of a stopping device, secured to the support between the movableclampingplates.

4. The combination of a fixed rod, a support, suspended on the rod,spring-actuated clamping-plates, fixed in the support, movableclamping-plates slid on the rod between the standards of the support andhaving their ends engaged in a slot provided in the base IIO of thesupport, and parallel to the axis of the have signed our names in thepresence of two fixed rod; a spiral spring, slid on the rodbesubscribing Witnesses.

tween the movable clamping-plates and holding them normally at a rightangle to the rod, 5 and of a gage adjustably secured to the supportbetween the movable clamping-plates. Witnesses:

In Witness that We claim the improvements CHARLES H. OLDERSHAW,

described in the foregoing specification we SIEGWAR'I SPIER.

